<template>
  <div class="login_container">
    <div class="login_box">
      <!--  头像    -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!--   登录表单   -->
      <el-form ref="loginRef"
               :model="loginForm"
               :rules="loginRules"
               label-width="0px"
               class="login_form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username"
                    prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input type="password"
                    v-model="loginForm.password"
                    prefix-icon="iconfont icon-3702mima"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="buttons">
          <el-button type="primary" @click="login()">登录</el-button>
          <el-button type="info" @click="resetLogin()">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
  export default {
    data () {
      return {
        // 登录表单数据对象
        loginForm: {
          username: 'admin',
          password: '123456'
        },
        // 登录表单验证
        loginRules: {
          username: [
            {
              required: true,
              message: '请输入用户名',
              trigger: 'blur'
            },
            {
              min: 3,
              max: 10,
              message: '长度在3到10个字符',
              trigger: 'blur'
            }
          ],
          password: [
            {
              required: true,
              message: '请输入密码',
              trigger: 'blur'
            },
            {
              min: 6,
              max: 15,
              message: '长度在6到15个字符',
              trigger: 'blur'
            }
          ]
        }
      }
    },
    methods: {
      // 登录方法
      login() {
        this.$refs.loginRef.validate(async valid => {
          if (!valid) return
          const { data: res } = await this.$http.post('login', this.loginForm)
          if (res.meta.status !== 200) return this.$message.error('登录失败')
          this.$message.success('登录成功')
          window.sessionStorage.setItem('token', res.data.token)
          await this.$router.push('/home')
        })
      },
      // 重置登录表单
      resetLogin () {
        this.$refs.loginRef.resetFields()
      }
    }
  }
</script>

<style lang="less" scoped>
  .login_container {
    background-color: #2b4b6b;
    height: 100%;
  }

  .login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avatar_box {
      width: 130px;
      height: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color: #fff;

      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
  }

  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }

  .buttons {
    display: flex;
    justify-content: flex-end;
  }
</style>
